Shimano GRX 820 2x12 Gravel Groupset

If you want a gravel groupset that’s built for true adventure, the latest Shimano GRX 820 2x12 delivers the perfect blend of range, reliability, and real-world comfort. At Bike Clinique, we’re fully manufacturer-trained and have extensive experience fitting GRX—so you get a flawless install, dialled shifting, and expert support for every ride.

Why Choose GRX 820 at Bike Clinique?
GRX 820 is Shimano’s latest evolution in gravel-specific shifting, now with a 2x12 setup for even more range and finer gear steps. Whether you’re hammering out big miles, tackling rough tracks, or loading up for a bikepacking trip, this groupset is engineered to keep you in control—no matter the conditions.

What’s Included:

• Shifters/Brakes: GRX BL-RX820 / ST-RX820 levers with flat-mount BR-RX820 calipers. Gravel-optimised ergonomics, non-slip grip, Servo Wave Action for powerful, controlled braking, and adjustable reach for all hand sizes.

• Rotors: Deore XT RT-MT800 Center Lock, 160mm front and rear, with Ice-Tech cooling for consistent stopping on long descents.

• Crankset: GRX FC-RX820-2, 2x12-speed, 48/31T chainrings, available in 170, 172.5, or 175mm. 151mm Q-factor for comfort and clearance with wide tyres.

• Front Derailleur: GRX FD-RX820, 2x12, with outward chainline for big tyre clearance and Toggle Link design for broad frame compatibility.

• Rear Derailleur: GRX RD-RX820 Shadow+, 2x12, with chain stabilizer for rough terrain and compatibility with 11-34T or 11-36T cassettes.

• Cassette: CS-HG710, 12-speed, 11-36T (or 11-34T), Hyperglide+ for seamless, quiet shifts even under load.

• Chain: Deore XT/Ultegra CN-M8100, 12-speed, 126 links, with chain lock and SIL-TEC coating for smooth, long-lasting performance.

Specs at a Glance:

• 2x12-speed (mechanical)

• Crank Lengths: 170, 172.5, 175mm

• Chainring: 48/31T

• Cassette: 11-36T (or 11-34T)

• Brake: Hydraulic disc, flat mount, 160mm rotors

• Freehub: Shimano Road

• Color: Black, grey, silver

• Weight: ~2715g (manufacturer)

How Does It Ride?
GRX 820 is all about crisp, reliable shifting, stable chain management, and braking you can trust—rain or shine, loaded or light. The gearing is perfect for big climbs and fast flats, the ergonomics are tuned for rough terrain, and every detail is engineered for real-world adventure. Riders love the smooth, quiet drivetrain and the confidence that comes with a pro-level install.

Why Trust Bike Clinique?
With full Shimano manufacturer training and extensive real-world experience, you get expert advice, a perfect install, and ongoing support. We’ll check your frame compatibility, talk through gearing and setup options, and provide a clear estimate before any work begins.

Ready to upgrade your gravel bike for real adventure?
Book a consultation, schedule your upgrade online, or call us on 07951125843. Pop into our Wimbledon workshop for a demo, get honest, jargon-free advice, and let us help you unlock the best of Shimano GRX for your next ride.